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Fabrication of EPDM/LDPE shape memory composites: the effect of vulcanization and crystals

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Abstract

In this paper, a series of ethylene propylene diene monomer/low density polyethylene (EPDM/LDPE) composites with the shape memory effect (SME) are prepared by polymer blending method. The cross-link structure and crystallization are regulated by the impact of thermodynamic factor and content of peroxide, and the influence on SME is also investigated. The results demonstrate that the interfacial adhesion originates from the good interfacial compatibility and interfacial grafting reaction between the phases, and the cross-linked chemical structure improves interfacial adhesion and forms abundant tiny LDPE crystals, which plays a crucial role in exploring the SME and improving the mechanical performance of EPDM/LDPE composites. A balanced state between the mechanical properties and SME is achieved when dicumyl peroxide content is 1 wt.%; the tensile strength and elongation at break reach 19.2 MPa and 1499%, respectively, while the shape fixation ratio (Rf) and shape recovery ratio (Rr) are ~ 99% and ~ 85%, respectively.

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Acknowledgements

This work was supported by 2019YFE0110700, the Key Projects of Basic Research and Applied Basic Research in Colleges and Universities in Guangdong Province (Grant Number: 2018KZDXM004) and Special project for innovation of high-end scientific research institutions in Zhongshan City (Grant Number: 2019AG013).

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Authors and Affiliations

  1. School of Mechanical and Automative Engineering, South China University of Technology, 381 Wushan Road, Tianhe District, Guangzhou, 510640, China

    Qiangqiang Han, Wei Liu & Yukun Chen

  2. Guangdong Meirun New Material Technology Co., LTD, Foshan, 528000, China

    Yunwang Xu & Ziwu Cao

  3. Zhongshan Institute of Modern Industrial Technology, South China University of Technology, Zhongshan, 528437, China

    Yukun Chen

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  1. Qiangqiang Han
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  2. Wei Liu
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Correspondence to Yunwang Xu, Ziwu Cao or Yukun Chen.

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Han, Q., Liu, W., Xu, Y. et al. Fabrication of EPDM/LDPE shape memory composites: the effect of vulcanization and crystals. Polym. Bull. 81, 2179–2196 (2024). https://doi.org/10.1007/s00289-023-04808-3

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  • DOI: https://doi.org/10.1007/s00289-023-04808-3

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